Chain and bolt operated burglar alarm



Oct. 25, 1966 Y. B. SPIEGEL CHAIN AND BOLT OPERATED BURGLAR ALARM Filed001;. 14, 1965 I" IA R O T N E V m 75774 .5. JP/EGEL BY A77Z7RN .5

United States Patent 3,288,787 CHAIN AND BOLT OPERATED BURGLAR ALARMYetta B. Spiegel, 310 Riverside Drive, New York, N.Y. Filed Oct. 14,1965, Ser. No. 496,098 6 Claims. (Cl. 11614) This invention relates to achain and bolt operated burglar alarm of the audible type.

A principal object of the present inventon is the provision of a moreefiicient, more reliable, more easily installed device of the kinddescribed, which is adapted for use in domestic and commercialestablishments, with little or no alteration of its components, toproduce warnings of unauthorized opening of doors and the like, as theyoccur.

Another object of the invention is to provide a chain and bolt lockingdevice adapted to be associated with a conventional chain and boltlocking device for operating a siren to produce a warning sound.

Still another object of the invention is to provide a burglar alarm thatis simple and inexpensive, characterized by fewness of parts andeconomical to manufacture and assemble.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawings and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

FIGURE 1 is an elevational view of a door and door jamb equipped withburglar alarm embodying the present invention shown in operativeposition.

FIG. 2 is a perspective view of the supporting plate on the door jamb.

FIG. 3 is a perspective view of the cooperating blocks and bolts forlocking the door and actuating the alarm.

FIG. 4 is a horizontal sectional view taken on the line 44 of FIG. 1.

FIG. 5 is an enlarged vertical sectional view taken on the line 55 ofFIG. 1.

FIG. 6 is a top perspective view of the audible alarm, parts being shownbroken away.

Referring now in detail to the various views of the drawings, in FIG. 1the improved burglar alarm system is shown associated with a door 10 anda door jamb 12. The burglar alarm system includes a rectangular shapedsupporting metal plate 14 on the door jamb 12 and a rectangular metalkeeper device 16 on the door 10.

The supporting plate 14 is vertically disposed and secured to the doorjamb by means of screws 18 passing through holes 20 in the plate. An eye22 is formed integrally with the body of the plate and is disposedhorizontally thereof. An angular hook 24 is formed integrally with theplate 14 above the eye 22 with its free leg 26 extending upwardly.

The keeper device 16 comprises a rectangular shaped base plate 28 and ishorizontally disposed and has another plate 38 superimposed thereon andfastened thereto by rivets 32. The plates 28 and 30 are fastened to thedoor by means of screws 34 passing through aligned holes in the plates28 and 30. Plate 30 is formed with a hood cover portion 36 integraltherewith and extending above the base plate 28 and extending along andover the base plate 28 for the greater portion of its area. The hoodportion 36 and the base plate 28 define a compartment 38. The hood coverportion is open at one end as indicated at 40 and is formed with acentral guide slot 42 intersecting the open end 40. The outer orintersection end of the slot is formed with curved corner edges 44 tofacilitate entrance thereinto. The closed end of the hood cover portion36 is formed with an opening 46.

3,280,787 Patented Oct. 25, 1966 Conventional door locking mechanism isassociated with the plate 14 and keeper device 16 and this mechanismincludes a heavy metal chain 48, the oval link 50 at one end extendingthrough the hole in the eye 22 and fastened thereto. The other end ofthe chain carries a rectangular metal block 52 having a round bolt 54radiating from one side thereof and extending through a doubleloop link56 at the other end of the chain. A head 58 is formed on the free end ofthe bolt to prevent removal of the double-loop link 56 from the bolt.The diameter of the bolt 54 is slightly less than the width of the slot42 to permit the bolt to slide along the slot, and the dimensions of theblock 52 are such as to permit the block to slide in the compartment 38.In use, the block 52 is inserted through the open end 40 of the hoodcover portion 36 into the compartment 38 where its body spans the slot42 and engages the edges of the slot to prevent the door 10 from beingcompletely opened as is usual.

In accordance with the present invention however, auxiliary lockingmechanism is provided. This mechanism includes another strong chain 60shorter than the chain 48, the oval link 62 at one end thereof beingslipped over the free leg 26 of the hook 24 on plate 14. The other endof the chain has a double-loop link 64 similar to link 56 of chain 48,which double-loop link is looped around a round bolt 66 similar to bolt54 and is prevented from slipping off bolt 66 by a head 68 on the boltsimilar to head 58 of bolt 54. Bolt 66 extends radially from a block 70similar to block 52. Block 70 slides in the compartment 38 similar toblock 52 when pulled by chain 60.

The present invention contemplates housing a wind instrument 74 in thecompartment 3 8 in the path of movement of one or both of the slidableblocks 52 and 70. The instrument 70 is conventional and comprises abellows structure having a rectangular casing 76 having rigid end walls78, 80 and a flexible accordion-pleated wall 82 constituting the foursides of the casing. A hole 83 is formed in the center of the end wall80. A coil spring 84 is interposed between the end walls urging the endwalls apart. A siren device 86 is mounted on the inner surface of theend wall '80. The siren device 86 includes a disc-shaped body 88 havingspaced holes 90 in annular formation around the periphery thereofcommtmicating with the opening 83 in end wall 80. A reed 92 is mountedon the body 88 and is adapted to cover opposed holes 90 to provide asound when the end walls are compressed together by the sliding movementof the blocks 52 and 70 upon opening of the door 10.

In operation, a slight opening of the door 10 will cause pullingmovement on the chain '60 whereupon block 70 will be moved against block52 which in turn will compress the casing thereby forcing air past thereed 92 through the holes 90 in the siren and out through the alignedholes 83 and 46 in the end wall 80 and hood 46, respectively, causing aprolonged sound thereby alerting an inmate or inmates to the fact thatsomeone is tampering with the door.

While I have illustrated and described the preferred embodiment of myinvention, it is to be understood that I do not limit myself to theprecise construction herein disclosed and that various changes andmodifications may be made within the scope of the invention :as definedin the appended claims.

What is claimed is:

1. In a warning system for premises having an openab'le door and a doorjamb, said system including a plate on the door jamb, a plate on thedoor in opposed relation to the plate on the door jamb, a hood coverportion over the plate on the door, said hood cover portion beingintegral with the plate on the door and extending substantia-lly thelength of the plate, said hood cover portion and door plate defining acompartment, a bellows device in said compartment, a siren devicemounted in said bellows device at one end thereof, said siren deviceincluding a disc shaped body with spaced holes in annular formationtherein, and a rotatable reed adapted to cover opposed holes, and chainand bolt means coacting with the plate on the door jamb and with thehood cover portion on the plate on the door, for locking the door andfor compressing the bellows device for forcing air through the sirendevice to produce a sound.

2. The combination according to claim 1 wherein the bellows deviceincludes a casing rectangular in configuration, said casing having apair of rigid end walls, one of the end walls having a central opening,an accordionpleated flexible wall constituting the four sides of thecasing, a coil spring interposed between the end walls inside thecasing, to urge the end walls apart, the siren device mounted on theinner surface of the perforated wall.

3. The combination according to claim 1 wherein the hood cover portionhas an open end and a slot extending centrally thereof intersecting theopening at the end, and wherein said chain and bolt means includes apair of chains having one end attached to the plate on the door jamb anda bolt and block assembly carried on the other end of each chain, andmovable along the slot and compartment, said blocks engaging a fixedportion of the hood cover portion for locking the door, one of theblocks adapted to contact the bellows device for actuating the sirendevice to produce a sound.

4. The combination according to claim 1 wherein the hood cover portionhas an open end and a slot extending centrally thereof and intersectingthe open end, and wherein the chain and bolt means includes a firstchain having one end fixed to the plate on the door jarmb, a boltcarried on the other end of the chain and extending through the slot inthe hood cover portion, a block fixed on the inner end of the bolt andslidable in the compartment into contact with said bellows device, asecond chain having one end removably attached to the plate on the doorjamb, a bolt carried on the other end of the second chain end extendingthrough the slot in the hood cover portion outwardly of the bolt on thefirst chain, and a block fixed on the inner end of the bolt on thesecond chain slidable against the first-named block, said blocksengaging a fixed portion of the hood cove-r portion for locking thedoor, said blocks being slidable upon opening of the door for comprisingthe bellow device for actuating the siren device to produce a sound.

5. The combination according to claim 1 wherein the hood cover portionhas an open end and a slot extending centnally thereof and intersectingthe opening at the end, and wherein the chain and bolt means includes afirst chain having one end fixed to the plate on the door jamb, a boltcarried on the other end of the chain and extending through the slot inthe hood cover portion, a block fixed on the inner end of the bolt andslidable in the compartment into contact with said bellows device, asecond chain having one end removab'ly attached to the plate on the doorjamb, a bolt carried on the other end of the second chain and extendingthrough the slot in the hood cover portion outwardly of the bolt on thefirst chain, and a block fixed on the inner end of the bolt on thesecond chain slidable against the first named block, said blocksengaging a fixed portion of the hood cover portion for locking the door,said blocks being slidable upon opening of the door for compressing thebellow device for actuating the siren device to produce a sound, saidsecond chain being shorter than the first chain so that upon opening ofthe door the second chain is pulled first moving its block against theblock of the first chain which in turn compresses the bellows device foractuating the siren device producing a sound therein.

6. The combination according to claim 5 wherein the bellows deviceincludes a casing rectangular in configuration, said casing having apair of rigid end walls, one of the end Walls having a central opening,an accordionpleated fiexible wall constituting the four sides of thecasing, a coil spring interposed between the end walls inside thecasing, to urge the end walls apart, a siren device mounted on the innersurface of the perforated wall adapted to be actuated by air forcedtherethrough and through the opening in the end wall upon compressing ofthe casing by the sliding blocks.

References Cited by the Examiner UNITED STATES PATENTS 587,377 8/1897Sutton 11614 604,918 5/1898 Hanson 46-179 677,113 6/1901 Bruce 46l78LOUIS J. CAPOZI, Primary Examiner.

1. IN A WARNING SYSTEM FOR PREMISES HAVING AN OPENABLE DOOR AND A DOORJAMB, SAID SYSTEM INCLUDING A PLATE ON THE DOOR JAMB, A PLATE ON THEDOOR IN OPPOSED RELATION TO THE PLATE ON THE DOOR JAMB, A HOOD COVERPORTION OVER THE PLATE ON THE DOOR, SAID HOOD COVER PORTION BEINGINTEGRAL WITH THE PLATE ON THE DOOR AND EXTENDING SUBSTANTIALLY THELENGTH OF THE PLATE, SAID HOOD COVER PORTION AND DOOR PLATE DEFINING ACOMPARTMENT, A BELLOWS DEVICE IN SAID COMPARTMENT, A SIREN DEVICEMOUNTED IN SAID BELLOWS DEVICE AT ONE END THEREOF, SAID SIREN DEVICEINCLUDING A DISC SHAPED BODY WITH SPACED HOLES IN AN-